There is concern as long as it exists and is infecting new cases.
People are concerned all over the world and public health authorities are on high alert to prevent the virus from coming into the first world.

In brief:
Continues

There is a hotspot of the disease in Central Africa.

There is concern as long as it exists and is infecting new cases.
People are concerned all over the world and public health authorities are on high alert to prevent the virus from coming into the first world.
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